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Top Forums UNIX for Dummies Questions & Answers Getting CPU utilization and memory for a process Post 302292967 by radiatejava on Monday 2nd of March 2009 05:25:52 AM
Old 03-02-2009
Getting CPU utilization and memory for a process

I am trying to get cpu util and memory occupied for a process. I use these (I am showing output also):

using top
----------
$ top p 25272 d 5
top - 01:52:17 up 2 days, 21:28, 2 users, load average: 0.02, 0.05, 0.06
Tasks: 1 total, 0 running, 1 sleeping, 0 stopped, 0 zombie
Cpu(s): 0.0% us, 0.0% sy, 0.0% ni, 100.0% id, 0.0% wa, 0.1% hi, 0.0% si
Mem: 4147560k total, 1628824k used, 2518736k free, 37320k buffers
Swap: 0k total, 0k used, 0k free, 244200k cached

PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
25272 911 16 0 1431m 1.1g 22m S 0.0 28.3 131:51.55 java

using ps
----------
$ ps -p 25272 u
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
911 25272 50.3 28.3 1465912 1175352 ? S Mar01 131:51 /usr/java/jre-1

Question - why does these 2 programs show different utilization for the same process ? ps is showing 50.0 % whereas top is showing 0.0 %.
 

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acctcom(1)							   User Commands							acctcom(1)

NAME
acctcom - search and print process accounting files SYNOPSIS
acctcom [-abfhikmqrtv] [-C sec] [-e time] [-E time] [-g group] [-H factor] [-I chars] [-l line] [-n pattern] [-o output-file] [-O sec] [-s time] [-S time] [-u user] [filename...] DESCRIPTION
The acctcom utility reads filenames, the standard input, or /var/adm/pacct, in the form described by acct.h(3HEAD) and writes selected records to standard output. Each record represents the execution of one process. The output shows the COMMAND NAME, USER, TTYNAME, START TIME, END TIME, REAL (SEC), CPU (SEC), MEAN SIZE (K), and optionally, F (the fork()/exec() flag: 1 for fork() without exec()), STAT (the system exit status), HOG FACTOR, KCORE MIN, CPU FACTOR, CHARS TRNSFD, and BLOCKS READ (total blocks read and written). A `#' is prepended to the command name if the command was executed with super-user privileges. If a process is not associated with a known terminal, a `?' is printed in the TTYNAME field. If no filename is specified, and if the standard input is associated with a terminal or /dev/null (as is the case when using `&' in the shell), /var/adm/pacct is read; otherwise, the standard input is read. If any filename arguments are given, they are read in their respective order. Each file is normally read forward, that is, in chronological order by process completion time. The file /var/adm/pacct is usually the current file to be examined; a busy system may need several such files of which all but the current file are found in /var/adm/pacctincr. OPTIONS
The following options are supported: -a Show some average statistics about the processes selected. The statistics will be printed after the output records. -b Read backwards, showing latest commands first. This option has no effect when standard input is read. -f Print the fork()/exec() flag and system exit status columns in the output. The numeric output for this option will be in octal. -h Instead of mean memory size, show the fraction of total available CPU time consumed by the process during its execution. This "hog factor" is computed as (total CPU time)/(elapsed time). -i Print columns containing the I/O counts in the output. -k Instead of memory size, show total kcore-minutes. -m Show mean core size (the default). -q Do not print any output records, just print the average statistics as with the -a option. -r Show CPU factor (user-time/(system-time + user-time)). -t Show separate system and user CPU times. -v Exclude column headings from the output. -C sec Show only processes with total CPU time (system-time + user-time) exceeding sec seconds. -e time Select processes existing at or before time. -E time Select processes ending at or before time. Using the same time for both -S and -E shows the processes that existed at time. -g group Show only processes belonging to group. The group may be designated by either the group ID or group name. -H factor Show only processes that exceed factor, where factor is the "hog factor" as explained in option -h above. -I chars Show only processes transferring more characters than the cutoff number given by chars. -l line Show only processes belonging to terminal /dev/term/line. -n pattern Show only commands matching pattern that may be a regular expression as in regcmp(3C), except + means one or more occur- rences. -o output-file Copy selected process records in the input data format to output-file; suppress printing to standard output. -O sec Show only processes with CPU system time exceeding sec seconds. -s time Select processes existing at or after time, given in the format hr[:min[:sec]]. -S time Select processes starting at or after time. -u user Show only processes belonging to user. The user may be specified by a user ID, a login name that is then converted to a user ID, `#' (which designates only those processes executed with superuser privileges), or `?' (which designates only those processes associated with unknown user IDs). FILES
/etc/group system group file /etc/passwd system password file /var/adm/pacctincr active processes accounting file ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWaccu | +-----------------------------+-----------------------------+ |CSI |enabled | +-----------------------------+-----------------------------+ SEE ALSO
ps(1), acct(1M), acctcms(1M), acctcon(1M), acctmerg(1M), acctprc(1M), acctsh(1M), fwtmp(1M), runacct(1M), su(1M), acct(2), regcmp(3C), acct.h(3HEAD), utmp(4), attributes(5) System Administration Guide: Basic Administration NOTES
acctcom reports only on processes that have terminated; use ps(1) for active processes. SunOS 5.10 11 Jan 1996 acctcom(1)
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